Using Self-Organization To Control Morphology in Molecular Photovoltaics

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• 作者：Seok Ju Kang ; Seokhoon Ahn ; Jong Bok Kim ; Christine Schenck ; Anna M. Hiszpanski ; Seokjoon Oh ; Theanne Schiros ; Yueh-Lin Loo ; Colin Nuckolls
• 刊名：The Journal of the American Chemical Society
• 出版年：2013
• 出版时间：February 13, 2013
• 年：2013
• 卷：135
• 期：6
• 页码：2207-2212
• 全文大小：410K
• 年卷期：v.135,no.6(February 13, 2013)
• ISSN：1520-5126

文摘

This work explores the formation of well-defined molecular p鈥搉 junctions in solution-processed self-assembled heterojunction solar cells using dodecyloxy-substituted contorted hexabenzocoronene (12-c-HBC) as a donor material and phenyl-C₇₀-butyric acid methyl ester (PC₇₀BM) as an acceptor. We find that the contorted 12-c-HBC molecules effectively assemble in solution to form a nested structure with the ball-shaped PC₇₀BM. The result is a self-assembled molecular-scale p鈥搉 junction. When this well-defined p鈥搉 junction is embedded in active films, we can make efficient self-assembled solar cells with minimal amounts of donor material relative to the acceptor. The power conversion efficiency is drastically enhanced by the mode of donor and acceptor assembly within the film.